I'm a complete noob, when it comes to microcontrollers, so I thought, before I dive into it I better ask if it is possible at all: I have PS/2 keyboards and ADB keyboards, and sometimes I'd like to switch between them without unplugging them. ADB needs the Vcc pin, the Gnd pin and two "normal" pins on the Teensy, PS/2 needs Vcc and Gnd as well. Would it work to solder an ADB port and a PS/2 port to the Teensy, flash it with a modified firmware and use two keyboards at the same time (over one USB port that would mean)?